He explained the system to me (NOT explained me the system). 他向我介绍了这个系统。 2. 【释义】 to give a reason for something or to be a reason for something 说明(是)…的原因: 【例句】 Wait! I can explain everything. 等一下! 我可以解释一切。
explain的用法：1、explain sth(to sb)，意思是：说明、解释某事，向某人解释某事。2、explain的习语有：explainyourself，意思是：为自己的行为作说明;explain away，意思是：为自己辩解。例句1、~ sth (to sb) 解释;说明;阐明to tell sb about sth in a way that makes it easy to understand[V...
It was difficult to explain the problem to beginners. 对初学者解释这个问题很难。 牛津词典 ‘Let me explain!’ he added helpfully. “让我来说明一下!”他热心地补充道。 牛津词典 I explained that an ambulance would be coming soon. 我解释说救护车很快就到。 牛津词典 He explained who each perso...
1. I've got to explain about it. 我得解释一下此事。 explain 情景对话 请求帮助 explain的意思 A:Would you mind doing something for me? 你不介意帮我做点事吗? explain的解释 B:I would if I could. 没问题,只要我办得到。 explain在线翻译 ...
TO EXPLAIN, OR NOT TO EXPLAIN?Beverly Mills
explain v [Tn, Tw, Dn.pr] ~ sth (to sb) make sth plain or clear; give the meaning of sth 解释; 讲解; 说明; 阐明: A dictionary explains the meaning of words. 词典是解释词义的工具书. * He explained his plan in some detail. 他仔细地说明了自己的计划. * Could you ...
If you want to make your queries as fast as possible, look out for Extra column values of Using filesort and Using temporary, or, in JSON-formatted EXPLAINoutput, for using_filesort and using_temporary_table properties equal to true. ...
explain为mysql提供语句的执行计划信息。可以应用在select、delete、insert、update和place语句上。explain的执行计划,只是作为语句执行过程的一个参考,实际执行的过程不一定和计划完全一致,但是执行计划中透露出的讯息却可以帮助选择更好的索引和写出更优化的查询语句
EXPLAIN is used to obtain a query execution plan (that is, an explanation of how MySQL would execute a query). 简单翻译一下,就是explain用于获取查询执行计划(即MySQL是如何执行一个查询的)。 工作中,我们会遇到慢查询,这个时候我们就可以在select语句之前增加explain关键字,模拟MySQL优化器执行SQL语句,从而...